.extend{
    margin: 0 auto;
    width: 1200px;
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
    margin-top: 20px;
}
.extension{
    width: 854px;
    height: 244px;
    display: flex;
    flex-direction: column;
}
/* 推广标题 */
.storey-title{
    display: flex;
    justify-content: start;
    height: 36px;
    margin-bottom: 16px;
    z-index: 33;
}
.tui-guang a {
    display: flex;
    justify-content: flex-start;
    text-decoration: none;
    color: black;
}
.storey-title a span{
    display:block;
    font-size: 20px;
    margin-left: 10px;
    height: 36px;
    line-height: 36px;
}
.tui-guang-little {
    margin-right: 10px;
}
.tui-guang-little a{
    display: flex;
    justify-content: flex-start;
    text-decoration: none;
    color: #505050;
}
.tui-guang-little a span{
    display:block;
    font-size: 12px;
    margin-left: 5px;
    height: 36px;
    line-height: 36px;
}
.tui-guang-little a span:hover{
 color: cornflowerblue;
 transition: all .5s;
}
/* 左侧四个视频 */
.ext-box{
    display: flex;
    justify-content: space-between;
    width: 854px;
    height: 192px;
}
/* 右侧观看 */
.bypb-window{
    position: relative;
    width: 320px;
    height: 184px;
    top: 0px;
}
/* 观看列表 */
.watch-list{
    width: 318px;
    height: 30px; 
    border:1px solid #e7e7e7;  
    background-color: #F4F4F4;
    margin-bottom: 20px;
}
.watch-list a{
    text-decoration: none;
    font-size: 12px;
    color: #505050;  
    text-align: center;
    line-height: 30px;
}
.watch-list a:hover{
   color: cornflowerblue;
   transition: all .5s;
}
/* 下面图片 */

.bypb-window a img{ 
    width: 100%;
    height: 100%;       
}
            /*字体图标*/
.icon-one {
    width: 30px;
    height: 30px;
    vertical-align: -0.15em;
    fill: currentColor;
    overflow: hidden;
  }
  .icon-two {
    position: relative;
    top: 5px;
    width: 20px;
    height: 20px;
    margin-left: 10px;
    /* vertical-align: -0.15em; */
    fill: currentColor;
    overflow: hidden;
  }
  